Richardson, G Malignant transformation occurring in mature cystic teratomas of the ovary. [electronic resource] - Canadian journal of surgery. Journal canadien de chirurgie Dec 1990 - 499-503 p. digital Publication Type: Case Reports; Journal Article ISSN: 0008-428X Subjects--Topical Terms: AdultAgedAged, 80 and overBiopsyCarcinoid Tumor--pathologyCell Transformation, Neoplastic--pathologyFemaleFrozen SectionsHumansIntraoperative Care--methodsOvarian Neoplasms--pathologySarcoma--pathologyTeratoma--pathology